A safety component for a disconnector operating mechanism

Abstract

This utility model provides a safety component for the operating mechanism of a disconnecting switch, belonging to the field of electrical equipment technology. This utility model features a main rotating shaft, an disconnecting rotating shaft, and a grounding rotating shaft rotatably mounted on a base frame. A first lock, a second lock, and an automatic lock are positioned beside the disconnecting rotating shaft. In the disconnected open state, both the first and second locks are unlocked, allowing both the disconnecting and grounding rotating shafts to rotate. When the first lock is engaged, it blocks the disconnecting rotating shaft, preventing its opening and closing operations. Furthermore, when closing via the grounding rotating shaft, the grounding shaft drives the main rotating shaft, which in turn drives the automatic lock. The second telescopic latch of the second lock blocks the disconnecting rotating shaft and the automatic lock, preventing operation of the disconnecting rotating shaft and restricting the movement of the first lock. This achieves interlocking between the program lock and the circuit breaker, preventing potential misoperation and further improving operational safety.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a safety component of a disconnector switch operating mechanism. Background Technology

[0002] As a key structural component in electrical equipment such as environmental protection cabinets, the operating mechanism of disconnecting switches ensures electrical safety during equipment maintenance or operation, preventing accidental electric shock or equipment damage. Therefore, improving the performance of disconnecting switch operating mechanisms has become a research direction in the industry.

[0003] Currently, existing disconnector operating mechanisms on the market, such as the disconnector operating mechanism on the environmental protection cabinet disclosed in patent application CN115938848A, have their main shaft, opening / closing operating shaft, and grounding operating shaft rotatably mounted on the frame. The energy storage component is located between the opening / closing operating shaft and the grounding operating shaft. The main shaft is connected to the opening / closing operating shaft and the grounding operating shaft through a linkage component. The main shaft switches between the opening and closing state and the closing state when the opening / closing operating shaft rotates through the linkage component to achieve the disconnection operation. Similarly, the main shaft switches between the opening and grounding state when the grounding operating shaft rotates through the linkage component to achieve the grounding operation. In addition, it also has a locking assembly and a front panel. The front panel has openings for the opening / closing operation shaft and the grounding operation shaft, respectively. A guide hole is provided on the front panel between the opening / closing operation shaft and the grounding operation shaft. A sliding hole of the stop plate is provided on the front panel for opening the opening / closing operation shaft or the grounding operation shaft. A lever is installed on the front panel and passes through the guide hole. The first spring support and the second spring support are installed on the front panel by screws. The two ends of the spring guide pin are respectively installed on the first spring support and the second spring support. The stop plate has a first sliding hole that cooperates with the first spring support and a second sliding hole that cooperates with the second spring support. A spring pressure block is provided in the middle of the front panel, and the spring pressure block slides with the spring guide pin. The first return spring and the second return spring are respectively sleeved on the spring guide pin at positions corresponding to both sides of the spring pressure block. Initially, the stop plate blocks the closing / opening operation hole and the grounding operation hole. When closing is required, the stop plate is slid towards the grounding operation hole using the lever until the closing / opening operation hole is open and the grounding operation hole is closed. At this point, the closing / opening operation shaft can be operated, but the grounding operation shaft cannot. Conversely, when grounding is required, the stop plate is slid towards the closing / opening operation hole using the lever until the grounding operation hole is open and the closing / opening operation hole is closed. At this point, the grounding operation shaft can be operated, but the closing / opening operation shaft cannot. This design prevents accidental operation and improves operational safety. Although the above structure provides a safety feature, any operator can still open the relevant operation holes by directly moving the lever, posing a risk of accidental operation and a safety defect. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, a safety component for a disconnector operating mechanism is provided. This component consists of a first lock, a second lock, and an automatic lock that work together on the disconnector shaft. In the open state, the disconnector shaft is not restricted, allowing for both opening and closing operations. In the closed state, the disconnector shaft is blocked, maintaining safety in the closed state, preventing safety risks caused by misoperation, and further ensuring operational safety.

[0005] The specific technical solution is as follows: A safety component for a disconnector operating mechanism includes a base frame, a main rotating shaft, an isolating rotating shaft, and a grounding rotating shaft. The main rotating shaft, isolating rotating shaft, and grounding rotating shaft are all rotatably mounted on the base frame. The component further includes a first lock, a second lock, and an automatic lock, all of which are located beside the isolating rotating shaft. The first lock includes a first telescopic bolt, which can selectively block the isolation pivot when it extends or retracts. The second lock includes a second telescopic bolt, which selectively blocks the isolation pivot when the second telescopic bolt extends, and blocks the first telescopic bolt when the second telescopic bolt extends. The automatic lock includes a cam, a push rod, a slide block, and a return spring. The cam is sleeved on the main rotating shaft and rotates with the main rotating shaft. One end of the push rod is hinged to the base frame. The slide block is slidably mounted on the base frame in one direction. When the slide block slides, one end of the slide block extends into or out of the extension path of the second telescopic lock tongue. One side of the other end of the push rod abuts against the cam, and the other side abuts against the slide block. One end of the return spring is connected to the slide block, and the other end is connected to the base frame. The force exerted by the return spring on the slide block is opposite to the force exerted by the push rod on the slide block.

[0006] In the aforementioned safety component of a disconnector operating mechanism, the first lock is an electric switch, and when the first lock is energized, the first telescopic bolt extends, and when the second lock is de-energized, the first telescopic bolt retracts.

[0007] The safety component of the aforementioned disconnector operating mechanism further includes an isolation motor, which is mounted on a base frame and is poweredly connected to the isolation shaft.

[0008] In the aforementioned safety component of a disconnector operating mechanism, a second lock and an automatic lock are arranged facing each other, and the disconnector shaft is located between the second lock and the automatic lock.

[0009] In the aforementioned safety component of a disconnector operating mechanism, the second telescopic latch includes a blocking section and a limiting section, wherein the blocking section and the limiting section are distributed in an "L" shape and their ends are connected and fixed to each other.

[0010] The safety component of the aforementioned disconnector operating mechanism includes a slide block comprising a base plate, a stop arm, and several slide columns. The slide columns are arranged in one direction and their lower ends are fixedly mounted on the base frame. Meanwhile, each slide column has a protruding slide head on its upper end face. The base plate is arranged parallel to the base frame and has a slide groove. The slide heads of the slide columns extend into the slide groove. The stop arm is mounted on the base plate, and one end of the stop arm is arranged towards the extension path of the second telescopic locking tongue.

[0011] In the aforementioned safety component of a disconnector operating mechanism, the cross-section of the slider is smaller than the cross-section of the slide column, so that a stepped surface is formed between the slider and the slide column, and the base plate is supported by the stepped surface after the slider extends into the slide groove.

[0012] In the aforementioned safety component of a disconnector operating mechanism, the second lock is a keyed lock.

[0013] The safety component of the aforementioned disconnector operating mechanism further includes a limit switch, which is mounted on a base frame and has its trigger portion facing the disconnector shaft.

[0014] The positive effects of the above technical solution are: The safety components of the aforementioned disconnector operating mechanism include a first lock with a first telescopic latch, a second lock with a second telescopic latch, and an automatic lock that slides in one direction, all mounted on the base frame and located beside the disconnector shaft. In the disconnected state, both the first and second locks are unlocked, allowing both the disconnector shaft and the grounding shaft to rotate. Furthermore, locking the first lock blocks the disconnector shaft, preventing its opening and closing operations. When the grounding shaft is closed, it drives the main shaft, which in turn moves the automatic lock. The second telescopic latch of the second lock blocks both the disconnector shaft and the automatic lock, ensuring that the disconnector shaft cannot be operated after the second lock is engaged. This interlocking between the program lock and the circuit breaker avoids misoperation and improves operational safety. Attached Figure Description

[0015] Figure 1 This is a structural diagram of an embodiment of a safety component of a disconnector switch operating mechanism according to the present invention; Figure 2 This is a structural diagram of an automatic lock for an isolating switch operating mechanism according to the present invention; Figure 3 This is a structural diagram of the second lock of a disconnector operating mechanism according to this utility model.

[0016] In the attached diagram: 1. Base frame; 2. Main shaft; 3. Isolation shaft; 4. First lock; 41. First telescopic bolt; 5. Second lock; 51. Second telescopic bolt; 511. Blocking section; 512. Restricting section; 6. Automatic lock; 61. Cam; 62. Push rod; 63. Slide; 631. Base plate; 632. Stop arm; 633. Slide column; 6311. Slide groove; 6331. Slide head; 7. Isolation motor; 8. Limit switch; 81. Trigger; 9. Grounding shaft. Detailed Implementation

[0017] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 3 The technical solution provided by this utility model is described in detail, but the following content is not intended to limit this utility model.

[0018] Figure 1 This is a structural diagram of an embodiment of a safety component of a disconnector switch operating mechanism according to this utility model. Figure 1 As shown, the safety components of the disconnector operating mechanism provided in this embodiment include: a base frame 1, a main rotating shaft 2, an isolating rotating shaft 3, a first lock 4, a second lock 5, a grounding rotating shaft 9, and an automatic lock 6. The main rotating shaft 2, the isolating rotating shaft 3, and the grounding rotating shaft 9 are all rotatably mounted on the base frame 1, providing the condition that the main rotating shaft 2 is driven to rotate by the isolating rotating shaft 3 or the grounding rotating shaft 9 when the latter rotates. It is worth noting that since there are many types of disconnectors on the market, many of their operating mechanisms incorporate structures that enable the isolating rotating shaft 3 or the grounding rotating shaft 9 to drive the main rotating shaft 2; this is common knowledge in the industry. Therefore, the specific connection structure between the isolating rotating shaft 3 or the grounding rotating shaft 9 and the main rotating shaft 2 will not be described in detail here.

[0019] Specifically, the first lock 4 is located on the side of the isolating shaft 3. The first lock 4 includes a first telescopic locking tongue 41. When the first lock 4 is locked, the first telescopic locking tongue 41 blocks the isolating shaft 3, making it impossible for the operator to operate the isolating shaft 3, that is, the opening and closing operation cannot be performed, thereby ensuring safety. When the first lock 4 is unlocked, the first telescopic locking tongue 41 retracts, providing conditions for subsequent operation of the isolating shaft 3.

[0020] Specifically, the second lock 5 is also located beside the isolating shaft 3. The second lock 5 includes a second telescopic latch 51. In the closed state, the second telescopic latch 51 extends and blocks the isolating shaft 3, thus restricting the rotation of the isolating shaft 3. In the open state, the second telescopic latch 51 selectively retracts to avoid the isolating shaft 3, allowing the operator to operate both the isolating shaft 3 and the grounding shaft 9. Furthermore, when the second telescopic latch 51 extends, it simultaneously restricts the extension of the first telescopic latch 41, achieving interlocking between the locks.

[0021] Figure 2 This is a structural diagram of an automatic locking mechanism for a disconnector switch operating mechanism according to this utility model. Figure 1 and Figure 2 As shown, the automatic lock 6 is also located beside the isolating shaft 3. The automatic lock 6 includes a cam 61, a push rod 62, a slide 63, and a return spring. The cam 61 is mounted on the main shaft 2 and rotates with it, allowing the cam 61 to rotate in the corresponding direction when the main shaft 2 rotates to perform opening and closing operations, thus enabling the automatic lock 6 to perform the corresponding action. At this time, one end of the push rod 62 is hinged to the base frame 1, and the slide 63 is slidably mounted on the base frame 1 in one direction. When the slide 63 slides, one end of the slide 63 extends into or out of the extension path of the second telescopic latch 51, providing conditions for selectively blocking the extension of the second telescopic latch 51. Furthermore, one side of the other end of the push rod 62 abuts against the cam 61, and the other side abuts against the slide 63, so that when the cam 61 pushes the push rod 62 to sway, it can push the slide 63 to slide on the base frame 1. Additionally, one end of the return spring is connected to the slide 63, and the other end is connected to the base frame 1. The force exerted by the return spring on the slide 63 is opposite to the force exerted by the push rod 62 on the slide 63. This allows the slide 63 to be reset by the return spring after the push rod 62 pushes the slide 63 to slide. That is, when the cam 61 rotates in the opposite direction, the push rod 62 loses its force on the slide 63, and the slide 63 resets under the action of the return spring. In use, when the grounding shaft 9 rotates to achieve closing, the main shaft 2 drives the automatic lock 6 to move so that one end of it exits the extension path of the second telescopic locking tongue 51. At the same time, the second lock 5 also moves so that the second telescopic locking tongue 51 extends. The second telescopic locking tongue 52 blocks the isolation shaft 3, preventing the operator from operating the isolation shaft 3 and performing opening and closing operations through the isolation shaft 3. At the same time, the second telescopic locking tongue 51 restricts one end of the slide 63 of the automatic lock 6, preventing the automatic lock 6 from automatically resetting. At the same time, the first lock 4 is blocked by the second telescopic bolt 51 of the second lock 5 and cannot move, thereby realizing the interlock between the program lock and the circuit breaker and improving safety.

[0022] More specifically, the first lock 4 is an electric switch. When the first lock 4 is energized, the first telescopic latch 41 extends; when the first lock 4 is de-energized, the first telescopic latch 41 retracts. This allows the first lock 4 to be controlled synchronously with the isolating switch. That is, when the isolating switch is closed, the first lock 4 is energized, and the first telescopic latch 41 extends to block the isolating shaft 3, improving safety. When the isolating switch is open, the first lock 4 is de-energized, causing the first telescopic latch 41 to retract, and the second lock 5 selectively blocks the operation of the isolating shaft 3. The structural design is more reasonable. It is worth noting that since there are many types of electric switches on the market, only one needs to be selected for installation in this embodiment. Therefore, the specific structure and operating principle of the electric switch will not be described in detail here.

[0023] More specifically, an isolation motor 7 is also installed on the base frame 1. The isolation motor 7 includes a reducer, which is poweredly connected to the isolation shaft 3. This allows the isolation motor 7 to drive the isolation shaft 3 to rotate via the reducer, thereby achieving electric control of the isolation shaft 3's movement and meeting the needs of remote and automatic control. Furthermore, the reducer effectively increases the torque on the isolation shaft 3, ensuring smooth rotation of the isolation shaft 3.

[0024] More specifically, the second lock 5 and the automatic lock 6 are arranged facing each other, and the isolation shaft 3 is located between the second lock 5 and the automatic lock 6. This allows the second telescopic bolt 51 of the second lock 5 to be affected by the slide block 63 of the automatic lock 6 when it moves toward the isolation shaft 3, thereby satisfying the use requirements of the automatic lock 6 to restrict or release the second telescopic bolt 51.

[0025] Figure 3 This is a structural diagram of the second lock of a disconnector operating mechanism according to this utility model. Figure 1 and Figure 3 As shown, the second telescopic latch 51 includes a blocking section 511 and a limiting section 512. The blocking section 511 and the limiting section 512 are arranged in an "L" shape and their ends are connected and fixed to each other. When the second telescopic latch 51 extends, the blocking section 511 blocks the isolation shaft 3, and the end of the limiting section 512 away from the blocking section 511 extends to the side of the slide block 63 away from the isolation shaft 3. That is, the slide block 63 loses its restriction on the limiting end, allowing the limiting end to move freely, thereby meeting the usage requirements of the second telescopic latch 51 extending. When the second telescopic latch 51 retracts, the blocking section 511 moves away from the isolation shaft 3, and one end of the limiting section 512 retracts to the end of the slide block 63 near the isolation shaft 3, ensuring that one end of the slide block 63 can block the second telescopic latch 51. The structural design is more reasonable.

[0026] More specifically, the slide block 63 of the automatic lock 6 includes a base plate 631, a stop arm 632, and several slide pillars 633. These slide pillars 633 are arranged in one direction and their lower ends are fixedly mounted on the base frame 1. Each slide pillar 633 has a protruding slide head 6331 on its upper end face. The base plate 631 is parallel to the base frame 1 and has a groove 6311. The slide heads 6331 of the slide pillars 633 extend into the groove 6311, thus supporting the base plate 631 and allowing it to slide relative to the base frame 1. This satisfies the requirement that the base plate 631 slides on the base frame 1 to allow the base to move relative to the isolation pivot 3. Furthermore, the stop arm 632 is mounted on the base plate 631, with one end facing the extension path of the second telescopic latch 51, providing conditions for the slide block 63 to act on the second telescopic latch 51.

[0027] More specifically, the cross-section of the slider 6331 on the upper end face of the slider 633 is smaller than the cross-section of the slider 633, so that a stepped surface can be formed between the slider 6331 and the slider 633. This allows the base plate 631 to be supported by the stepped surface after the slider 6331 extends into the groove 6311, maintaining the stability of the base plate 631 installation. It is worth noting that a connecting hole is provided on the slider 6331, and a limiting screw is installed in the connecting hole. The head of the limiting screw is located above the base plate 631, and the width of its cross-section is greater than the width of the groove 6311. That is, the limiting screw prevents the slider 6331 from coming out of the groove 6311, making the structural design more reasonable.

[0028] More specifically, the second lock 5 is a keyed lock, allowing authorized personnel to operate it. This means only specific personnel can unlock the second lock 5 to operate the isolation shaft 3, preventing security issues caused by unauthorized operation and potential misoperation. It is worth noting that various keyed locks are available on the market; in this embodiment, only a commercially available purchase and installation are required. Therefore, the specific structure of the keyed second lock 5 will not be described in detail here.

[0029] More specifically, a limit switch 8 is also installed on the base frame 1, with the trigger part 81 of the limit switch 8 facing the isolation shaft 3. This allows the operator to promptly detect when the isolation shaft 3 is being operated via the limit switch 8, further enhancing safety. It is worth noting that a gap is provided between the trigger part 81 of the limit switch 8 and the isolation shaft 3, facilitating the operator to use external tools such as socket wrenches to rotate the isolation shaft 3. When the external tool is connected to the isolation shaft 3, it can push the trigger part 81 to move, thereby triggering the limit switch 8 and meeting monitoring requirements.

[0030] The safety components of the disconnector operating mechanism provided in this embodiment include a base frame 1, a main rotating shaft 2, an isolating rotating shaft 3, a first lock 4, a second lock 5, a grounding rotating shaft 9, and an automatic lock 6. By rotatably mounting the main rotating shaft 2, the isolating rotating shaft 3, and the grounding rotating shaft 9 on the base frame 1, and placing the first lock 4, the second lock 5, and the automatic lock 6 beside the isolating rotating shaft 3, in the disconnected state, both the first lock 4 and the second lock 5 are unlocked, allowing both the isolating rotating shaft 3 and the grounding rotating shaft 9 to rotate. When the first lock 4 is locked, the automatic lock 6 can be used to... When the isolating shaft 3 is blocked, it cannot be opened or closed. In addition, when closing the circuit through the grounding shaft 9, the grounding shaft 9 drives the main shaft 2 to rotate, thereby driving the automatic lock 6 to move. The second telescopic locking tongue 51 of the second lock 5 can block the isolating shaft 3 and the automatic lock 6, so that after the second lock 5 is locked, the isolating shaft 3 cannot be operated, and the movement of the first lock 4 is restricted. This realizes the interlock between the program lock and the circuit breaker, prevents safety problems caused by operator misoperation, and further improves operational safety.

[0031] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A safety assembly of an isolator operating mechanism, comprising a base frame, a main rotating shaft, an isolating rotating shaft and a grounding rotating shaft, the main rotating shaft, the isolating rotating shaft and the grounding rotating shaft are all rotatably installed on the base frame, characterized in that, Also includes: The system comprises a first lock, a second lock, and an automatic lock, all of which are located beside the isolation shaft. The first lock includes a first telescopic bolt, which can selectively block the isolation shaft when it extends or retracts; The second lock includes a second telescopic bolt, which selectively blocks the isolation pivot when the second telescopic bolt extends, and blocks the first telescopic bolt when the second telescopic bolt extends. The automatic lock includes a cam, a push rod, a slide block, and a return spring. The cam is sleeved on the main rotating shaft and rotates with the main rotating shaft. One end of the push rod is hinged to the base frame. The slide block is slidably disposed on the base frame in one direction. When the slide block slides, one end of the slide block extends into or out of the extension path of the second telescopic lock tongue. One side of the other end of the push rod abuts against the cam, and the other side abuts against the slide block. One end of the return spring is connected to the slide block, and the other end is connected to the base frame. The force exerted by the return spring on the slide block is opposite to the force exerted by the push rod on the slide block.

2. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, The first lock is an electric switch, and when the first lock is energized, the first telescopic bolt extends, and when the second lock is de-energized, the first telescopic bolt retracts.

3. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, It also includes an isolation motor, which is mounted on the base frame and is poweredly connected to the isolation shaft.

4. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, The second lock and the automatic lock are arranged facing each other, and the isolation pivot is located between the second lock and the automatic lock.

5. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, The second telescopic latch includes a blocking section and a limiting section, wherein the blocking section and the limiting section are distributed in an "L" shape and their ends are connected and fixed to each other.

6. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, The slide block includes a base plate, a stop arm, and several slide columns. The slide columns are arranged in one direction and their lower ends are fixedly installed on the base frame. At the same time, each slide column has a protruding slide head on its upper end face. The base plate is arranged parallel to the base frame and has a slide groove. The slide heads of the slide columns extend into the slide groove. The stop arm is disposed on the base plate, and one end of the stop arm is arranged towards the extension path of the second telescopic lock tongue.

7. The safety component of the disconnector operating mechanism according to claim 6, characterized in that, The cross-section of the slider is smaller than the cross-section of the slide bar, so that a stepped surface is formed between the slider and the slide bar, and the base plate is supported by the stepped surface after the slider extends into the slide groove.

8. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, The second lock is a keyed lock.

9. The safety component of the disconnector operating mechanism according to claim 1, characterized in that, It also includes a limit switch, which is mounted on the base frame and the trigger portion of the limit switch is arranged facing the isolation shaft.

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